Green Roof Types

The type of vegetation for a green roof can be loosely classified in these categories:

Extensive – lightweight – sedum blanket or mat solutions – below 90kg/m2 – low maintenance.

  • There are solutions that are marketed that can be installed with a saturated weight of 55kg/m
  • We would always recommend that you try wherever possible to install with at least 80mm of substrate (if not more – with the blanket or mat this would give a saturated weight of approximately 120kg/m2

Extensive – sedum and herb roofs using seeds plug plants and or turfs/blankets

  • This s the approach we recommend  – depending on the depth of substrate the saturated weight would between 120 – 250kg/m2 – low maintenance, may need some irrigation in long periods of drought.

Semi-intensive green roofs – more garden like green roofs – herbs, food, ornamental flowers – medium maintenance with regular irrigation through dry periods.

  • Generally an semi-intensive green roof needs regular maintenance – saturated weight of between 170 – 300kg/m2

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Why an Online DIY Green Roof Guide rather than another PDF/eBook?

An online resource let’s us be more dynamic. We regularly update the material. We will add more multimedia items such as videos. When new methods are discovered we will add these to the site. It also allows us to provide relevant articles and case studies.

Occasionally there maybe confusion over terms used in the guide. Or perhaps something is not completely clear. If you are struggling with specific details and need further illumination then queries should be addressed via the Members’ Support Form and we will do our best to answer as quickly and accurately as we can.